Of course Levi had watched, and he'd been wary of it all. He couldn't say he still wasn't -- the power to regrow limbs was both awe-inspiring and horrifying all at once. It wasn't a slight at Regulus or Sabrina, but people with that power could obviously do so much more -- probably not all of it good. Levi knew the nature of people enough to have some caution.
But he was grateful. Erwin deserved good things after the sacrifices he'd made and Levi was glad he could get them.
He wasn't exactly the talkative type, not usually, but he was willing to give it a little more effort for Regulus, who had dome them both a kindness. "I'm sure he'll thank you another fifty times, at least," Levi said, glancing up from his phone, which he honestly felt a little bit obsessed with.